drivers/regulator/hi655x-regulator.c

   1 /*
   2  * Device driver for regulators in Hi655x IC
   3  *
   4  * Copyright (c) 2016 Hisilicon.
   5  *
   6  * Authors:
   7  * Chen Feng <puck.chen@hisilicon.com>
   8  * Fei  Wang <w.f@huawei.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/bitops.h>
  16 #include <linux/device.h>
  17 #include <linux/err.h>
  18 #include <linux/module.h>
  19 #include <linux/io.h>
  20 #include <linux/of.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/regmap.h>
  23 #include <linux/regulator/driver.h>
  24 #include <linux/regulator/machine.h>
  25 #include <linux/regulator/of_regulator.h>
  26 #include <linux/mfd/hi655x-pmic.h>
  27
  28 struct hi655x_regulator {
  29         unsigned int disable_reg;
  30         unsigned int status_reg;
  31         unsigned int ctrl_mask;
  32         struct regulator_desc rdesc;
  33 };
  34
  35 /* LDO7 & LDO10 */
  36 static const unsigned int ldo7_voltages[] = {
  37         1800000, 1850000, 2850000, 2900000,
  38         3000000, 3100000, 3200000, 3300000,
  39 };
  40
  41 static const unsigned int ldo19_voltages[] = {
  42         1800000, 1850000, 1900000, 1750000,
  43         2800000, 2850000, 2900000, 3000000,
  44 };
  45
  46 static const unsigned int ldo22_voltages[] = {
  47          900000, 1000000, 1050000, 1100000,
  48         1150000, 1175000, 1185000, 1200000,
  49 };
  50
  51 enum hi655x_regulator_id {
  52         HI655X_LDO0,
  53         HI655X_LDO1,
  54         HI655X_LDO2,
  55         HI655X_LDO3,
  56         HI655X_LDO4,
  57         HI655X_LDO5,
  58         HI655X_LDO6,
  59         HI655X_LDO7,
  60         HI655X_LDO8,
  61         HI655X_LDO9,
  62         HI655X_LDO10,
  63         HI655X_LDO11,
  64         HI655X_LDO12,
  65         HI655X_LDO13,
  66         HI655X_LDO14,
  67         HI655X_LDO15,
  68         HI655X_LDO16,
  69         HI655X_LDO17,
  70         HI655X_LDO18,
  71         HI655X_LDO19,
  72         HI655X_LDO20,
  73         HI655X_LDO21,
  74         HI655X_LDO22,
  75 };
  76
  77 static int hi655x_is_enabled(struct regulator_dev *rdev)
  78 {
  79         unsigned int value = 0;
  80
  81         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
  82
  83         regmap_read(rdev->regmap, regulator->status_reg, &value);
  84         return (value & BIT(regulator->ctrl_mask));
  85 }
  86
  87 static int hi655x_disable(struct regulator_dev *rdev)
  88 {
  89         int ret = 0;
  90
  91         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
  92
  93         ret = regmap_write(rdev->regmap, regulator->disable_reg,
  94                            BIT(regulator->ctrl_mask));
  95         return ret;
  96 }
  97
  98 static const struct regulator_ops hi655x_regulator_ops = {
  99         .enable = regulator_enable_regmap,
 100         .disable = hi655x_disable,
 101         .is_enabled = hi655x_is_enabled,
 102         .list_voltage = regulator_list_voltage_table,
 103         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 104         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 105 };
 106
 107 static const struct regulator_ops hi655x_ldo_linear_ops = {
 108         .enable = regulator_enable_regmap,
 109         .disable = hi655x_disable,
 110         .is_enabled = hi655x_is_enabled,
 111         .list_voltage = regulator_list_voltage_linear,
 112         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 113         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 114 };
 115
 116 #define HI655X_LDO(_ID, vreg, vmask, ereg, dreg,                 \
 117                    sreg, cmask, vtable) {                        \
 118         .rdesc = {                                               \
 119                 .name            = #_ID,                         \
 120                 .of_match        = of_match_ptr(#_ID),           \
 121                 .ops             = &hi655x_regulator_ops,        \
 122                 .regulators_node = of_match_ptr("regulators"),   \
 123                 .type            = REGULATOR_VOLTAGE,            \
 124                 .id              = HI655X_##_ID,                 \
 125                 .owner           = THIS_MODULE,                  \
 126                 .n_voltages      = ARRAY_SIZE(vtable),           \
 127                 .volt_table      = vtable,                       \
 128                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
 129                 .vsel_mask       = vmask,                        \
 130                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
 131                 .enable_mask     = BIT(cmask),                   \
 132         },                                                       \
 133         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
 134         .status_reg = HI655X_BUS_ADDR(sreg),                     \
 135         .ctrl_mask = cmask,                                      \
 136 }
 137
 138 #define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg,          \
 139                           sreg, cmask, minv, nvolt, vstep) {     \
 140         .rdesc = {                                               \
 141                 .name            = #_ID,                         \
 142                 .of_match        = of_match_ptr(#_ID),           \
 143                 .ops             = &hi655x_ldo_linear_ops,       \
 144                 .regulators_node = of_match_ptr("regulators"),   \
 145                 .type            = REGULATOR_VOLTAGE,            \
 146                 .id              = HI655X_##_ID,                 \
 147                 .owner           = THIS_MODULE,                  \
 148                 .min_uV          = minv,                         \
 149                 .n_voltages      = nvolt,                        \
 150                 .uV_step         = vstep,                        \
 151                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
 152                 .vsel_mask       = vmask,                        \
 153                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
 154                 .enable_mask     = BIT(cmask),                   \
 155         },                                                       \
 156         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
 157         .status_reg = HI655X_BUS_ADDR(sreg),                     \
 158         .ctrl_mask = cmask,                                      \
 159 }
 160
 161 static struct hi655x_regulator regulators[] = {
 162         HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
 163                           2500000, 8, 100000),
 164         HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
 165         HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
 166         HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
 167                           1600000, 8, 50000),
 168         HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
 169                           2500000, 8, 100000),
 170         HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
 171                           1600000, 8, 50000),
 172         HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
 173                           2500000, 8, 100000),
 174         HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
 175         HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
 176                           1650000, 8, 50000),
 177         HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
 178 };
 179
 180 static int hi655x_regulator_probe(struct platform_device *pdev)
 181 {
 182         unsigned int i;
 183         struct hi655x_regulator *regulator;
 184         struct hi655x_pmic *pmic;
 185         struct regulator_config config = { };
 186         struct regulator_dev *rdev;
 187
 188         pmic = dev_get_drvdata(pdev->dev.parent);
 189         if (!pmic) {
 190                 dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
 191                 return -ENODEV;
 192         }
 193
 194         regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
 195         if (!regulator)
 196                 return -ENOMEM;
 197
 198         platform_set_drvdata(pdev, regulator);
 199
 200         config.dev = pdev->dev.parent;
 201         config.regmap = pmic->regmap;
 202         config.driver_data = regulator;
 203         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 204                 rdev = devm_regulator_register(&pdev->dev,
 205                                                &regulators[i].rdesc,
 206                                                &config);
 207                 if (IS_ERR(rdev)) {
 208                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 209                                 regulator->rdesc.name);
 210                         return PTR_ERR(rdev);
 211                 }
 212         }
 213         return 0;
 214 }
 215
 216 static const struct platform_device_id hi655x_regulator_table[] = {
 217         { .name = "hi655x-regulator" },
 218         {},
 219 };
 220 MODULE_DEVICE_TABLE(platform, hi655x_regulator_table);
 221
 222 static struct platform_driver hi655x_regulator_driver = {
 223         .id_table = hi655x_regulator_table,
 224         .driver = {
 225                 .name   = "hi655x-regulator",
 226         },
 227         .probe  = hi655x_regulator_probe,
 228 };
 229 module_platform_driver(hi655x_regulator_driver);
 230
 231 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
 232 MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
 233 MODULE_LICENSE("GPL v2");